I remember pulling the sideplate on my first Smith maybe thirty five years ago. I was concerned that there were neutron accelerators, plutonium spheres, and unobtanium springs. Luckily, it was much simpler than that.
I realize that MIM parts are the wave of the future, that they are quite precise and cheaper to make. Doesn't mean I'm particularly fond of them.
One of the many great things about Smiths is how easy it is to work on them. Snipping a coil or so off the rebound slide spring will make a big difference in the trigger pull, tho' it will get mushy and sluggish if you get carried away.
Not entirely sure that L-frame Centennials make a whole lot of sense, but the more traditional J-frames are the wonder the world awaited. Great ergonomics, snag free frame, and the vaunted ability to shoot out of a coat pocket (even if it sets your LL Bean on fire) makes them a great choice.
Moon